E3-00" - Discharge Pressure Abnormality (Units With No Pressure Sensor); E5-00" - Compressor Motor Lock Or Overheated - Daikin FTXTA30AW Service Manual

ESIE17-19C | Part 2. Troubleshooting
2.2.2.2. "E3-00" – Discharge pressure abnormality (units with no pressure sensor)
Trigger
High pressure switch opens due to meas-
ure pressure > 41.7 bar.
High pressure control (measure pressure
> 38 bar) occurs 16 times within 300 min-
utes.
Possible cause
Faulty high pressure switch.
Faulty outdoor unit main PCB.
Faulty capacity adapter on outdoor PCB.
Refrigerant overcharge.
Humidity in refrigerant (ice formation in
expansion valve).
Non condensables in refrigerant.
Refrigerant is contaminated.
Stop valve is closed.
Faulty outdoor fan motor.
More info:
Check procedures
"High pressure switch" on page 58
"Fan motor" on page 55
2.2.2.3. "E5-00" – Compressor motor lock or overheated
Trigger
Compressor overload is detected.
Possible cause
Faulty discharge pipe thermistor.
Faulty outdoor fan motor.
19/08/19 | Version 1.1
Optimized Heating 4
Effect
Unit will stop operating.
Check
Check high pressure switch.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Check if the correct adapter is installed.
Check if the correct spare part is installed.
Check for refrigerant overcharge. Refer to
the nameplate for the correct charge.
Check for humidity in the refrigerant.
Check for non condensables in refriger-
ant.
Check for non condensables in refriger-
ant.
Check if stop valve is open.
Check the fan motor.
Check fan motor connections and wiring.
Replacing procedures
"Replacing high pressure switch" on page 94
"Replacing main PCB" on page 95
"Replacing DC fan motor assembly" on page 87
Effect
Unit will stop operating.
Check
Check discharge pipe thermistor.
Check the fan motor.
Check fan motor connections and wiring.
2.2. Error based troubleshooting
Reset
Manual reset via user interface.
Corrective action
Replace high pressure switch.
Adjust the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Adjust capacity adapter when required.
Charge the correct refrigerant amount
when required.
In case of suspicion of humidity, recover,
vacuum and recharge with virgin refriger-
ant.
In case of suspicion of non condensables,
recover, vacuum and recharge with virgin
refrigerant.
In case of suspicion of non condensables.
Recover, vacuum and recharge refriger-
ant.
Open stop valve when required.
Replace fan motor when required.
Adjust wiring when required.
Reset
Automatic reset if the unit runs for 60 sec-
onds without error.
Corrective action
Replace discharge pipe thermistor when
required.
Replace fan motor when required.
Adjust wiring when required.
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